Excavator hniav casting

Excavator hniav

HCMP foundry tuaj yeem nrum siab manganese steel hniav ntawm excavator thiab shovels.

Manganese hlau: ASTM128 Qib E1 (Mn13Mo1) ...

Peb cov khoom yuav ua kom ntseeg tau siab tshaj plaws hnav lub neej.